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Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads
An experimental investigation of circular concrete-filled steel tubular (CFST) columns subjected to very low-elevation lateral impacts was performed. Six circular CFST members were prepared for lateral impact tests according to the typical CFST columns in high-speed railway stations in China, and th...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10643663/ https://www.ncbi.nlm.nih.gov/pubmed/37957220 http://dx.doi.org/10.1038/s41598-023-47103-x |
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author | Liang, Jiayu Liu, Yanhui Zhao, Yichao Xu, Nan |
author_facet | Liang, Jiayu Liu, Yanhui Zhao, Yichao Xu, Nan |
author_sort | Liang, Jiayu |
collection | PubMed |
description | An experimental investigation of circular concrete-filled steel tubular (CFST) columns subjected to very low-elevation lateral impacts was performed. Six circular CFST members were prepared for lateral impact tests according to the typical CFST columns in high-speed railway stations in China, and the impact location was at the height of the 2/9 column. The tests had three variables: the thickness of the steel tube, the impact velocity, and the axial load. The failure modes were determined in the tests, along with the time histories of the impact force and the deflection at the impact location. A finite-element analysis was performed to examine the effects of the axial load and scaling on the maximum deflection. The results show that with the increase of axial compression ratio, the impact resistance of the member first increases and then weakens. According to the travelling plastic hinge theory, a three-stage rigid plastic mechanical model was employed to describe the impact process, in which the impact location was at the non-mid-span, and a deflection calculation method for CFST applicable to any impact position was developed. A comparison with the test results indicated that deflections can be calculated with reasonable accuracy using the proposed method. |
format | Online Article Text |
id | pubmed-10643663 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-106436632023-11-13 Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads Liang, Jiayu Liu, Yanhui Zhao, Yichao Xu, Nan Sci Rep Article An experimental investigation of circular concrete-filled steel tubular (CFST) columns subjected to very low-elevation lateral impacts was performed. Six circular CFST members were prepared for lateral impact tests according to the typical CFST columns in high-speed railway stations in China, and the impact location was at the height of the 2/9 column. The tests had three variables: the thickness of the steel tube, the impact velocity, and the axial load. The failure modes were determined in the tests, along with the time histories of the impact force and the deflection at the impact location. A finite-element analysis was performed to examine the effects of the axial load and scaling on the maximum deflection. The results show that with the increase of axial compression ratio, the impact resistance of the member first increases and then weakens. According to the travelling plastic hinge theory, a three-stage rigid plastic mechanical model was employed to describe the impact process, in which the impact location was at the non-mid-span, and a deflection calculation method for CFST applicable to any impact position was developed. A comparison with the test results indicated that deflections can be calculated with reasonable accuracy using the proposed method. Nature Publishing Group UK 2023-11-13 /pmc/articles/PMC10643663/ /pubmed/37957220 http://dx.doi.org/10.1038/s41598-023-47103-x Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Liang, Jiayu Liu, Yanhui Zhao, Yichao Xu, Nan Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
title | Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
title_full | Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
title_fullStr | Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
title_full_unstemmed | Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
title_short | Tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
title_sort | tests and deflection calculation method for circular concrete-filled steel tubular columns under very low-elevation lateral impact loads |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10643663/ https://www.ncbi.nlm.nih.gov/pubmed/37957220 http://dx.doi.org/10.1038/s41598-023-47103-x |
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